Quinoacridine Derivatives with One-Dimensional Aggregation-Induced Red Emission Property

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• 作者：Iqbal Javed ; Tianlei Zhou ; Faheem Muhammad ; Jianhua Guo ; Hongyu Zhang ; Yue Wang
• 刊名：Langmuir
• 出版年：2012
• 出版时间：January 17, 2012
• 年：2012
• 卷：28
• 期：2
• 页码：1439-1446
• 全文大小：517K
• 年卷期：v.28,no.2(January 17, 2012)
• ISSN：1520-5827

文摘

A new series of acceptor鈥揹onor鈥揳cceptor (A鈥揇鈥揂) type quinoacridine derivatives (1鈥?b>3) with aggregation-induced red emission properties were designed and synthesized. In these compounds, the electron-withdrawing 2-(3,5-bis(trifluoromethyl)phenyl)acetonitrile groups act as electron-accepting units, while the alkyl-substituted conjugated core acts as electron-donating units. The restriction of intramolecular rotation was responsible for the AIE behavior of compounds 1鈥?b>3. All compounds were employed as building blocks to fabricate one-dimensional (1-D) organic luminescent nano- or microwires based on reprecipitation or slow evaporation approaches. Morphological transition from zero-dimensional (0-D) hollow nanospheres to 1-D nanotubes has been observed by recording SEM and TEM images of aggregated sates of compound 2 in THF/H₂O mixtures at different aging time. It was demonstrated that the synthesized compounds with different lengths of alkyl chains displayed different wire formation properties. The single-crystal X-ray analysis of compound 2 provided reasonable explanation for the formation of 1-D nano- or microstructures.